Theoretical and Experimental Research of Ultra-High-Performance Concrete Tensile Behaviour Based on Micro-Analysis

The cracking resistance and durability of the ultra-high-performance concrete (UHPC) structure are directly affected by its tensile behaviour. A micro-analysis method was established to study behaviour UHPC before appearance visible cracks. cooperative characteristic steel fibre cement matrix taken as a research focus method. random distribution considered normal distribution. Based on method, divided into elastic stage micro-damage development stage. Other data sourced elsewhere were used verify feasibility necessary tested using pure bending specimens theoretical model. results show that working mechanism inner can be described test at match is dominated contribution ignored. bilinear model proposed describe constitutive cracks, limitations each 8.85 MPa 12.36 MPa.